Disco 4 (LR4) Rear wiper noise

Hey all, advice required. Noticed my rear wiper hadn’t been in fully contact with the window and I decided to push and tighten the bolt on arm. I also noticed wiper arm wasn’t in great position so I did force it back abit and it made a noise as if I was pushing against a toothed wheel or something. Just went to start and try to night and wiper motor making a really weird grinding noise continuously even when attempting to start the lr4. I take it I have ruined the motor and a new one is required?????

Fitted a used motor of flea bay. Sorted